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iOS Swift 2.0 Basics Swift Types String Manipulation

Posted by vernell blackman
vernell blackman
123 Points

Hello I am taking the swift 2.0 class and i am on a challenge question and can't seem to get past it.

Challenge Task 2 of 2 Now that we have an appropriate greeting for our user, let's make a bit more polite by concatenating the greeting string with a second string literal. 
Declare a constant named finalGreeting, and concatenate the value of greeting with the string literal " How are you?". 
Example: "Hi there, Pasan. How are you?”

let name = "Vernell." let greeting = "Hi there," let interpolatedgreeting = "(greeting) (name)"

let finalGreeting = "How are you?" let concatenateaddress = "(greeting) (name) (finalGreeting)

I don't really understand the question and the use of the word literal and how I'm suppose to use it. The first challenge question was fine but this one i don't know.

strings.swift 
let name = "Vernell."
let greeting = "Hi there,"
let interpolatedgreeting = "\(greeting) \(name)"

let finalGreeting = "How are you?"
let concatenateaddress = "\(greeting) \(name) \(finalGreeting)

3 Answers

jcorum
jcorum
71,830 Points

I agree. It's misleading!

Happy coding.

jcorum
jcorum
71,830 Points
jcorum
jcorum
71,830 Points

Almost, but "interpolated greeting" was instructions on what to do rather than the name of a variable. Note that there's no period after your name. The editor is picky, and just wanted your name in the name variable. Also, it's important that the String " How are you?" start with a space, as greeting doesn't end with one and you need one between the two. 

let name = "Vernell"
let greeting = "Hi there, \(name)."

let finalGreeting = greeting + " How are you?"

You could also do the last one like this (outside the challenge):

let finalGreeting = greeting + " " + "How are you?"

to get the space, but the first way is usually better.

vernell blackman
vernell blackman
123 Points

Thank you, i see what you did but i don't understand why "finalgreeting" is there in the first place, i don't know but to me in this question its like it was just there to mess people up.

vernell blackman
vernell blackman
123 Points
vernell blackman
vernell blackman
123 Points

Hey i am on this other challenge question that i don't understand, I've been messing around and staring at my playground for a long while trying to think of something but i don't understand.

the is the question...

Challenge Task 2 of 2 Given these two values we just declared, we want to compute the product and print out the product in a formatted string. 
Step 1: Declare a constant named product and assign the result of multiplying firstValue and secondValue together. (To multiply two values, a and b, we write a * b). 
Step 2: Using string interpolation, create a string literal that describes the operation we just performed. For example, given the following values for firstValue, secondValue and product respectively: 2, 4, 8. The string should read: "The product of 2 times 4 is 8". Assign this string to a constant named output.